The place where the shooting happens also looks like the same place where the Doctor appears to regenerate in previous trailers – though whether this is the real deal remains a mystery.

This week's episode ended pretty tensely, as the Doctor finally revealed his blindness to Bill after a few episodes of hiding it.

Yet he was in a bit of a pickle after needing his sight to get out of a chamber containing a potentially apocalyptic virus, with Bill nobly requesting the monks restore his sight in return for taking over the world.